import os
import time
import uuid
from typing import Dict, Any, List
from .models import Script, GenerationStatus
from ...utils import get_logger

logger = get_logger(__name__)

class ExportManager:
    def __init__(self, config: Dict[str, Any] = None):
        self.config = config or {}
        self.output_dir = self.config.get('output_dir', 'output/export')
        os.makedirs(self.output_dir, exist_ok=True)

    def render_project(self, script: Script, options: Dict[str, Any]) -> str:
        """
        Renders the final video for the project.
        Returns the relative URL of the exported file.
        """
        logger.info(f"Starting export for project {script.id} with options: {options}")
        
        # Options
        resolution = options.get('resolution', '1080p')
        format = options.get('format', 'mp4')
        subtitles = options.get('subtitles', 'burn-in')
        
        # Mock Rendering Process
        # 1. Collect Assets (Video, Audio)
        # 2. Stitch Video
        # 3. Mix Audio
        # 4. Burn Subtitles
        
        try:
            # Simulate processing time based on frame count
            duration = len(script.frames) * 0.5 # 0.5s per frame processing mock
            time.sleep(min(duration, 5)) # Cap at 5s for demo
            
            filename = f"{script.id}_{int(time.time())}.{format}"
            output_path = os.path.join(self.output_dir, filename)
            
            # Create a dummy file
            with open(output_path, 'wb') as f:
                f.write(b'dummy video content')
                
            logger.info(f"Export completed: {output_path}")
            return os.path.relpath(output_path, "output")
            
        except Exception as e:
            logger.error(f"Export failed: {e}")
            raise e

    def _stitch_video(self, frames: List[Any], output_path: str):
        # TODO: Implement FFmpeg stitching
        pass

    def _mix_audio(self, audio_tracks: List[Any], output_path: str):
        # TODO: Implement FFmpeg audio mixing
        pass

    def _add_subtitles(self, video_path: str, subtitles: List[Any]):
        # TODO: Implement FFmpeg subtitle burning
        pass
